From e910fba5aa0ee51bbecd5965cca85dea98920977 Mon Sep 17 00:00:00 2001 From: David Wu Date: Thu, 23 Jun 2022 09:45:11 +0800 Subject: mb/google/brya/var/osiris: Disable PCH USB2 phy power gating The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for osiris board. Please refer Intel doc#723158 for more information. BUG=None TEST=Verify the build for osiris board Signed-off-by: David Wu Change-Id: Ia30a7b915df14c91a2526dca3e374436da286b7a Reviewed-on: https://review.coreboot.org/c/coreboot/+/65324 Tested-by: build bot (Jenkins) Reviewed-by: Ren Kuo --- src/mainboard/google/brya/variants/osiris/overridetree.cb | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src') diff --git a/src/mainboard/google/brya/variants/osiris/overridetree.cb b/src/mainboard/google/brya/variants/osiris/overridetree.cb index 6200daae85..4e32c0dde6 100644 --- a/src/mainboard/google/brya/variants/osiris/overridetree.cb +++ b/src/mainboard/google/brya/variants/osiris/overridetree.cb @@ -11,6 +11,10 @@ end chip soc/intel/alderlake register "sagv" = "SaGv_Enabled" + # As per Intel Advisory doc#723158, the change is required to prevent possible + # display flickering issue. + register "usb2_phy_sus_pg_disable" = "1" + register "usb2_ports[1]" = "USB2_PORT_EMPTY" # Disable USB2_C1 register "usb2_ports[3]" = "USB2_PORT_EMPTY" # Disable M.2 WWAN -- cgit v1.2.3